<template>
  <div class="cropper-content">
    <div class="cropper-box">
      <div class="cropper">
        <vue-cropper
          ref="cropper"
          :img="option.img"
          :output-size="option.outputSize"
          :output-type="option.outputType"
          :info="option.info"
          :can-scale="option.canScale"
          :auto-crop="option.autoCrop"
          :auto-crop-width="option.autoCropWidth"
          :auto-crop-height="option.autoCropHeight"
          :fixed="option.fixed"
          :fixed-number="option.fixedNumber"
          :full="option.full"
          :fixed-box="option.fixedBox"
          :can-move="option.canMove"
          :can-move-box="option.canMoveBox"
          :original="option.original"
          :center-box="option.centerBox"
          :height="option.height"
          :info-true="option.infoTrue"
          :max-img-size="option.maxImgSize"
          :enlarge="option.enlarge"
          :mode="option.mode"
          @realTime="realTime"
          @imgLoad="imgLoad"
        />
      </div>
      <!--底部操作工具按钮-->
      <div class="footer-btn">
        <div class="scope-btn">
          <label class="btn" for="uploads">选择图片</label>
          <input
            id="uploads"
            type="file"
            style="position: absolute; clip: rect(0 0 0 0)"
            accept="image/png, image/jpeg, image/gif, image/jpg"
            @change="selectImg($event)"
          />
          <el-button
            size="mini"
            type="danger"
            plain
            icon="el-icon-zoom-in"
            @click="changeScale(1)"
            >放大</el-button
          >
          <el-button
            size="mini"
            type="danger"
            plain
            icon="el-icon-zoom-out"
            @click="changeScale(-1)"
            >缩小</el-button
          >
          <!--  <el-button size="mini" type="danger" plain @click="rotateLeft"
            >↺ 左旋转</el-button
          >
          <el-button size="mini" type="danger" plain @click="rotateRight"
            >↻ 右旋转</el-button
          > -->
        </div>
        <div class="upload-btn">
          <el-button size="mini" type="success" @click="uploadImg('blob')"
            >上传图片 <i class="el-icon-upload"
          /></el-button>
        </div>
      </div>
    </div>
    <!--预览效果图-->
    <!-- <div class="show-preview">
      <div :style="previews.div" class="preview">
        <img :src="previews.url" :style="previews.img" />
      </div>
    </div> -->
  </div>
</template>

<script>
import { VueCropper } from 'vue-cropper'
import { upload } from '@/api/table'
export default {
  name: 'CropperImage',
  components: {
    VueCropper
  },
  data () {
    return {
      name: '',
      previews: {},
      option: {
        img: '', // 裁剪图片的地址
        outputSize: 1, // 裁剪生成图片的质量(可选0.1 - 1)
        outputType: 'png', // 裁剪生成图片的格式（jpeg || png || webp）
        info: true, // 图片大小信息
        canScale: true, // 图片是否允许滚轮缩放
        autoCrop: true, // 是否默认生成截图框
        autoCropWidth: 230, // 默认生成截图框宽度
        autoCropHeight: 280, // 默认生成截图框高度
        fixed: true, // 是否开启截图框宽高固定比例
        fixedNumber: [4, 5], // 截图框的宽高比例
        full: false, // false按原比例裁切图片，不失真
        fixedBox: true, // 固定截图框大小，不允许改变
        canMove: true, // 上传图片是否可以移动
        canMoveBox: true, // 截图框能否拖动
        original: false, // 上传图片按照原始比例渲染
        centerBox: false, // 截图框是否被限制在图片里面
        height: true, // 是否按照设备的dpr 输出等比例图片
        infoTrue: false, // true为展示真实输出图片宽高，false展示看到的截图框宽高
        maxImgSize: 3000, // 限制图片最大宽度和高度
        enlarge: 1, // 图片根据截图框输出比例倍数
        mode: '230px 280px' // 图片默认渲染方式
      }
    }
  },
  methods: {
    // 初始化函数
    imgLoad (msg) {
      console.log('工具初始化函数=====' + msg)
    },
    // 图片缩放
    changeScale (num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    // 向左旋转
    rotateLeft () {
      this.$refs.cropper.rotateLeft()
    },
    // 向右旋转
    rotateRight () {
      this.$refs.cropper.rotateRight()
    },
    // 实时预览函数
    realTime (data) {
      this.previews = data
    },
    // 选择图片
    selectImg (e) {
      const file = e.target.files[0]

      if (!/\.(jpg|jpeg|png|JPG|PNG)$/.test(e.target.value)) {
        this.$message({
          message: '图片类型要求：jpeg、jpg、png',
          type: 'error'
        })
        return false
      }
      // 转化为blob
      const reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        this.option.img = data
        this.name = file.name
      }
      // 转化为base64
      reader.readAsDataURL(file)
    },
    // 上传图片
    uploadImg (type) {
      if (!this.option.img) {
        this.$message({
          message: '请选择封面！',
          type: 'error'
        })
        return false
      }
      const _this = this
      if (type === 'blob') {
        // 获取截图的blob数据
        this.$refs.cropper.getCropBlob(async (data) => {
          const formData = new FormData()
          formData.append('file', data, 'DX.jpg')
          // 调用axios上传
          const result = await upload(formData)
          // const { data: res } = await _this.$http.post('/api/file/imgUpload', formData)4

          if (result.code === 200) {
            _this.$emit('uploadImgSuccess', result.data)
            this.option.img = ''
          } else {
            _this.$message({
              message: '文件服务异常，请联系管理员！',
              type: 'error'
            })
          }
        })
      }
    }
  }
}
</script>

<style scoped lang="scss">
.cropper-content {
  display: flex;
  display: -webkit-flex;
  justify-content: flex-end;
  .cropper-box {
    flex: 1;
    width: 100%;
    .cropper {
      width: auto;
      height: 50vh;
    }
  }

  .show-preview {
    flex: 1;
    -webkit-flex: 1;
    display: flex;
    display: -webkit-flex;
    justify-content: center;
    .preview {
      overflow: hidden;
      border: 1px solid #67c23a;
      background: #cccccc;
    }
  }
}
.footer-btn {
  margin-top: 30px;
  display: flex;
  display: -webkit-flex;
  justify-content: center;
  .scope-btn {
    display: flex;
    display: -webkit-flex;
    justify-content: space-between;
    padding-right: 10px;
  }
  .upload-btn {
    display: flex;
    display: -webkit-flex;
    justify-content: center;
  }
  .btn {
    outline: none;
    display: inline-block;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    -webkit-appearance: none;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    outline: 0;
    -webkit-transition: 0.1s;
    transition: 0.1s;
    font-weight: 500;
    padding: 8px 15px;
    font-size: 12px;
    border-radius: 3px;
    color: #fff;
    background-color: #409eff;
    border-color: #409eff;
    margin-right: 10px;
  }
}
</style>

